To adjust the font size on your device, which will affect the text size in all apps including Insight Timer, follow these steps:
For iOS:
- Open your device's Settings app
 - Navigate to Accessibility > Display & Text Size
 - Tap on "Larger Text" for more font size options
 - Use the slider to select your preferred font size
 
For Android:
- Open your device's Settings app
 - Tap on "Accessibility," then "Text and display"
 - Select "Font size"
 - Adjust the slider to choose your desired font size
 
These changes will affect the text size across your device, including in all your apps.